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Hynix 4GB DDR2 800Mhz - 4x4GB DDR2 RAM memory - system does not start //

snif_eR 4458 11
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  • #1 16843936
    snif_eR
    Level 7  
    Posts: 9
    Rate: 1
    I will try to be brief and to the point ;)

    I have:

    AMD Athlon II X3 440
    Processor

    Socket AM3 (938)

    AMD 770 rev. 00

    Motherboard - GIGABYTE GA-MA770-UD3 (rev 2.1)
    Motherboard

    Bios Updated
    ----
    So far I have been using ram memory - 1GB SP2-6400 DDR2 5-5-5-15 mushkin - x4 and everything was fine.

    Due to the fact that I use system virtualization in VirtualBox a lot and I need more memory, I bought it

    in HYNIX 4GB 2RX4 PC2-6400U-666-12 (x4 = 16GB)

    DIMM # 1
    SMBus address 0x50
    Memory type DDR2
    Module format Regular UDIMM
    Manufacturer (ID) Hyundai Electronics (AD00000000000000000000)
    Size 4096 MBytes
    Max bandwidth PC2-6400 (400 MHz)
    Part number
    Serial number 00000003
    Manufacturing date Week 05 / Year 11
    Number of banks 8
    Data width 64 bits
    Correction None
    Nominal Voltage 1.80 Volts
    EPP no
    XMP no
    AMP no
    JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
    JEDEC # 1 5.0-6-6-18-24 @ 400 MHz

    In summary, the first two (blue) memory slots are working properly.
    After adding the next two memories, the system stops at the Bios boot screen.

    (Memory functional, sockets functional, bios updated, motherboard and processor compatible)
    I am asking for help, or at least a guide where to look for the cause of the problem.

    Greetings :)
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  • #3 16844466
    snif_eR
    Level 7  
    Posts: 9
    Rate: 1
    lazania wrote:
    These bones are not on the compatibility list for this board.
    http://www.gigabyte.pl/products/page/mb/ga-ma770-ud3_20#support-doc


    Ok, this memory is not on the list, but 8 GB works fine. The problem arises after adding another 4 or 8 GB (the system becomes on the bios startup screen).

    Bios updated to the latest version, I keep working :)
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  • #4 16844835
    enhanced
    Level 43  
    Posts: 10427
    Help: 961
    Rate: 876
    Double-sided memory maybe? Maybe raise the voltage to 2.0V and add some memory.
  • #5 16845064
    bolekis
    Level 35  
    Posts: 2894
    Help: 199
    Rate: 261
    Alternatively, if you still have old modules, try adding the old ones above 8 GB. If the disc will be in the 9 or 10 GB configuration, check if it will work stably.
  • #6 16845100
    snif_eR
    Level 7  
    Posts: 9
    Rate: 1
    enhanced wrote:
    Double-sided memory maybe? Maybe raise the voltage to 2.0V and add some memory.


    Yes, the memories are double-sided, I raised to 2.0 I added dice, no changes.
    I also tried to manually enter timings from memory rigidly but it did not help.

    bolekis wrote:
    Alternatively, if you still have old modules, try adding the old ones above 8 GB. If the disc will be in the 9 or 10 GB configuration, check if it will work stably.


    Unfortunately, I have already checked this option without changes.

    I will add that 2x4GB is nice. After adding 1x4GB, which gives a total of 12GB, the computer crashes the bluescreen while the system is already loading, and after adding 2x4GB + 2x4GB, the computer does not even move, i.e. the dark screen 0 reaction.

    In bios I changed Ganged or Unganged - no changes. I keep figuring out :)
    Attachments:
    • Hynix 4GB DDR2 800Mhz - 4x4GB DDR2 RAM memory - system does not start // CPU-Zz.jpg (250.69 KB) You must be logged in to download this attachment.
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  • #7 16845115
    TomekxD
    Level 29  
    Posts: 1666
    Help: 62
    Rate: 190
    Have you tried to swap pairs of dice?
  • #8 16845122
    snif_eR
    Level 7  
    Posts: 9
    Rate: 1
    TomekxD wrote:
    Have you tried to swap pairs of dice?


    Yes, no change.
  • Helpful post
    #9 16846488
    enhanced
    Level 43  
    Posts: 10427
    Help: 961
    Rate: 876
    Then set the lowest possible clock speed and 2.0V and then add memory.

    I wonder if it's not the fault of the processor?
  • #10 16848990
    snif_eR
    Level 7  
    Posts: 9
    Rate: 1
    enhanced wrote:
    Then set the lowest possible clock speed and 2.0V and then add memory.

    I wonder if it's not the fault of the processor?


    Ladies and gentlemen,

    Problem solved :) )

    2x 4GB = 8GB (x4 = 800Mhz) approx

    3x 4GB = 12GB (x3.33 = 667Mhz) approx

    4x 4GB = 16GB (x2.66 = 533Mhz) perfectly

    I left the voltage unchanged (1.80V), timings for Auto and years :) :lol:
    Hynix 4GB DDR2 800Mhz - 4x4GB DDR2 RAM memory - system does not start //
  • #11 16849000
    enhanced
    Level 43  
    Posts: 10427
    Help: 961
    Rate: 876
    Well that's good because I did not think that this theme would surprise. No wonder, because newer laptops may have problems with the highest clock speed when filling all 4 slots.
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  • #12 16858517
    snif_eR
    Level 7  
    Posts: 9
    Rate: 1
    Solving the puzzle - changing the RAM clock to a lower one, and years like this doll. Have a nice day :)

Topic summary

✨ The discussion revolves around compatibility issues with Hynix 4GB DDR2 800MHz RAM modules on a GIGABYTE GA-MA770-UD3 motherboard. The user initially experienced stability with 4x1GB RAM but faced problems when upgrading to 4x4GB (16GB total). Despite updating the BIOS and adjusting settings, the system failed to boot or crashed during startup. Suggestions included raising the voltage to 2.0V, testing different memory configurations, and lowering the clock speed. Ultimately, the user resolved the issue by configuring the RAM to run at lower speeds (533MHz) while maintaining the voltage at 1.80V and using auto timings, allowing the system to function correctly with 4x4GB RAM.
Generated by the language model.

FAQ

TL;DR: On a GA‑MA770‑UD3 with an Athlon II X3, 16 GB (4×4 GB) Hynix PC2‑6400U booted only after downclocking RAM to ~533 MHz; “Problem solved.” [Elektroda, snif_eR, post #16848990]

Why it matters: If your DDR2 system hangs at POST with four DIMMs, lowering the DRAM clock can restore stability without extra voltage.

Quick-Facts

Quick Facts

How do I fix a GA‑MA770‑UD3 that won’t start after adding 4×4 GB DDR2?

Lower the DRAM clock in BIOS. The working outcome reported was 4×4 GB at ~533 MHz with 1.80 V and Auto timings. The user confirmed, “Problem solved.” [Elektroda, snif_eR, post #16848990]

What exact RAM behavior was observed at different capacities?

Measured outcomes: 2×4 GB ran near 800 MHz; 3×4 GB ran near 667 MHz; 4×4 GB stabilized only at ~533 MHz. That’s a typical downclock when all four DDR2 slots are populated. [Elektroda, snif_eR, post #16848990]

My system shows a black screen/no POST after installing the fourth DIMM. What does that indicate?

In this case, adding the fourth 4 GB stick caused a dark screen and no reaction. The fix was lowering the RAM clock, after which the system booted normally. [Elektroda, snif_eR, post #16845100]

Will raising DRAM voltage to 2.0 V help with 16 GB DDR2 on this setup?

Raising to 2.0 V and forcing timings did not resolve POST issues here. Stability came from reducing the memory clock instead. [Elektroda, snif_eR, post #16845100]

What final BIOS settings worked for 16 GB?

Keep DRAM voltage at 1.80 V, timings on Auto, and set the memory clock to the lower step that posts (reported stable at ~533 MHz). [Elektroda, snif_eR, post #16848990]

Is it normal to lose memory speed when all four DDR2 slots are filled?

Yes. The controller can require a lower clock with four populated slots. One respondent noted systems often struggle at top speed when fully populated. [Elektroda, enhanced, post #16849000]

Are Hynix 4 GB 2Rx4 PC2‑6400U DIMMs compatible with GA‑MA770‑UD3?

They worked here when downclocked. 2×4 GB operated at 800 MHz; all four required ~533 MHz to boot and run stable. [Elektroda, snif_eR, post #16848990]

Do ganged/unganged modes matter for this issue?

Switching between ganged and unganged made no difference in this case. The boot issue persisted until the RAM clock was reduced. [Elektroda, snif_eR, post #16845100]

Should I swap stick positions or pairs to debug?

Swapping pairs was tried and did not change the outcome. The decisive change was lowering the memory frequency. [Elektroda, snif_eR, post #16845122]

Can I mix older 1 GB DDR2 with 4 GB modules to reach 9–10 GB?

Mixing with older modules was tested and did not improve stability at higher clocks. The system still needed a lower memory speed. [Elektroda, snif_eR, post #16845100]

Is 12 GB (3×4 GB) stable on this platform?

Before tuning, 12 GB reached OS load but blue‑screened. After downclocking, 3×4 GB ran around 667 MHz and was stable. [Elektroda, snif_eR, post #16845100]

Could the CPU’s memory controller be the limiting factor?

A participant suspected the CPU/IMC might be the constraint. Practical resolution still came from setting the lowest memory clock that posts. [Elektroda, enhanced, post #16846488]

Are these Hynix modules on the GA‑MA770‑UD3 QVL?

A user checked and noted these specific sticks were not on the QVL. Compatibility was achieved via downclocking, not official listing. [Elektroda, lazania, post #16844397]

What does the label 2Rx4 imply for the Hynix DDR2 used here?

The modules were identified as 4 GB Hynix 2Rx4 PC2‑6400U, and the user confirmed they are double‑sided. That trait was present in the working setup. [Elektroda, snif_eR, post #16843936]

How do I apply the fix? (3‑step quick start)

  1. Enter BIOS and set the memory clock to the lowest available step.
  2. Keep DRAM voltage at 1.80 V and timings on Auto.
  3. Save, boot, and verify stability; raise one step only if fully stable. “Set the lowest possible clock speed.” [Elektroda, enhanced, post #16846488]
Generated by the language model.
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